CN118413264A - Self-adaptive transmission system and method for low-resource satellite-ground hierarchical decision of low-orbit satellite - Google Patents
Self-adaptive transmission system and method for low-resource satellite-ground hierarchical decision of low-orbit satellite Download PDFInfo
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- CN118413264A CN118413264A CN202410635713.9A CN202410635713A CN118413264A CN 118413264 A CN118413264 A CN 118413264A CN 202410635713 A CN202410635713 A CN 202410635713A CN 118413264 A CN118413264 A CN 118413264A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000969 carrier Substances 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 abstract description 5
- 230000003993 interaction Effects 0.000 abstract 1
- 230000003044 adaptive effect Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18582—Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18586—Arrangements for data transporting, e.g. for an end to end data transport or check
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Abstract
The invention discloses a low-resource satellite-ground hierarchical decision self-adaptive transmission system and method for a low-orbit satellite, and belongs to the field of satellite communication self-adaptive transmission. The invention comprises a satellite-borne base station and a ground terminal; the satellite-borne base station comprises a satellite-borne network controller, a satellite-borne interaction device, a satellite-borne modulator and a satellite-borne demodulator; the ground terminal comprises a modulator, a demodulator and an access controller; the ground terminal sends uplink state application information to the satellite-borne base station, calculates a smooth signal-to-noise ratio according to the uplink state information fed back by the satellite-borne base station, uploads the smooth signal-to-noise ratio to the satellite-borne base station, the satellite-borne base station selects a corresponding carrier rate to be distributed to the ground terminal according to the residual carrier resource condition and the smooth signal-to-noise ratio reported by the ground terminal, and the ground terminal adjusts a modulation coding mode of sending uplink analog signals according to the carrier rate distributed by the satellite-borne base station. The invention unloads the large data volume processed by the satellite-borne base station to each ground terminal to realize distributed processing; the self-adaptive transmission processing capacity of the whole system is improved.
Description
Technical Field
The invention relates to the field of satellite communication self-adaptive transmission, in particular to a low-resource satellite-ground hierarchical decision self-adaptive transmission system and method for a low-orbit satellite.
Background
The low orbit satellite communication has the following characteristics: the satellite motion causes the continuous change of the distance between the satellite and the ground; the large satellite view field causes different weather conditions in different areas, so that the satellite link loss is different; satellites need to support large and small stations, and the link capacities of different stations are different. By combining the three points, in order to fully utilize the link power, the low-orbit satellite needs to count the uplink state aiming at different terminals in real time, make decisions on carrier waves, modulation codes and the like, and realize the adaptation of the carrier capacity and the link capacity. Because the satellite-borne base station needs to estimate the link state in real time for each terminal, the number of the terminals is involved, the generated data volume is large, and the contradiction is generated between the limited processing capacity of the satellite-borne base station.
Disclosure of Invention
In view of this, the present invention provides a low-resource satellite-ground hierarchical decision adaptive transmission system and method for low-orbit satellites. The invention unloads the large data volume processed by the satellite-borne base station to each ground terminal to realize distributed processing; the self-adaptive transmission processing capacity of the whole system is improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The self-adaptive transmission system for low-resource satellite-ground layering decision of the low-orbit satellite comprises a satellite-borne base station and a ground terminal;
The satellite-borne base station comprises a satellite-borne network controller, a satellite-borne exchange, a satellite-borne modulator and a satellite-borne demodulator; the satellite-borne network control selects a corresponding carrier rate to be distributed to the ground terminal according to the residual carrier resource condition and the smooth signal-to-noise ratio reported by the ground terminal, and generates a link layer frame; the satellite-borne exchange realizes information exchange among a satellite-borne modulator, a satellite-borne demodulator and a satellite-borne network controller; the satellite-borne modulator modulates the link layer frame codes generated by the satellite-borne demodulator and the satellite-borne network control into downlink analog signals for transmission; the satellite-borne demodulator can demodulate multiple paths of carriers with different rates, estimate the signal-to-noise ratio of uplink carriers corresponding to each path of carrier, and generate a link layer frame;
The ground terminal comprises a modulator, a demodulator and an access controller; the modulator modulates the link layer frame code generated by the access controller into an uplink analog signal for transmission; the demodulator can demodulate the downlink analog signal and generate a link layer frame for transmission to the access controller; the access controller can generate a link layer frame, buffer a plurality of uplink carrier signal-to-noise ratios and calculate a smooth signal-to-noise ratio, and can adjust a modulation coding mode of sending uplink analog signals according to the smooth signal-to-noise ratio and a carrier rate distributed by a satellite-borne network control.
The self-adaptive transmission method for the low-orbit satellite low-resource satellite-ground hierarchical decision is realized based on the self-adaptive transmission system for the low-orbit satellite low-resource satellite-ground hierarchical decision, and specifically comprises the following steps of:
step 1, an access controller of a ground terminal continuously generates uplink state application information, sends the uplink state application information to a modulator, modulates the uplink state application information into an uplink analog signal by the modulator, and sends the uplink analog signal to a satellite-borne base station;
Wherein the uplink state application information includes a device ID of a ground terminal;
Step 2, demodulating after receiving the uplink analog signal, extracting uplink state application information, estimating an uplink carrier signal-to-noise ratio corresponding to the uplink analog signal, generating uplink state information according to the uplink carrier signal-to-noise ratio, transmitting the uplink state information to a satellite modulator through satellite-borne exchange by the satellite-borne demodulator, modulating the uplink state information into a downlink analog signal by the satellite-borne modulator, and transmitting the downlink analog signal to a ground terminal;
step 3, the demodulator of the ground terminal demodulates the downlink analog signal, extracts the uplink state information and transmits the uplink state information to the access controller, and the access controller obtains the uplink carrier signal-to-noise ratio according to the uplink state information;
step 4, the access controller continuously caches the latest obtained signal-to-noise ratios of the plurality of uplink carriers, marks the average value of the signal-to-noise ratios of the plurality of uplink carriers as a smooth signal-to-noise ratio, generates a satellite-borne network control reporting frame according to the smooth signal-to-noise ratio, transmits the satellite-borne network control reporting frame to a modulator, modulates the satellite-borne network control reporting frame into an uplink analog signal, and transmits the uplink analog signal to a satellite-borne base station;
step 5, demodulating after the satellite-borne demodulator receives the uplink analog signal, extracting a satellite-borne network control reporting frame, and transmitting the satellite-borne network control reporting frame to a satellite-borne network control through satellite-borne exchange;
Step 6, the satellite-borne network control selects corresponding carrier rates according to the residual carrier resource condition and the smooth signal-to-noise ratio in the report frame of the satellite-borne network control, distributes the carrier rates to the ground terminal, generates a frame plan according to the carrier rates, transmits the frame plan to a satellite-borne modulator through satellite-borne exchange, modulates the frame plan into a downlink analog signal by the satellite-borne modulator, and transmits the downlink analog signal to the ground terminal;
Step 7, the demodulator of the ground terminal demodulates the downlink analog signal, extracts the frame plan and transmits to the access controller, and the access controller adjusts the modulation coding mode of the uplink analog signal according to the carrier rate distributed in the frame plan and the smooth signal-to-noise ratio calculated in the step 3; and (3) continuously executing the steps 1 to 7 to realize the self-adaptive transmission of the low-resource satellite-ground layering decision of the low-orbit satellite.
Due to the adoption of the technical scheme, the invention has the beneficial effects compared with the prior art that:
According to the invention, the large data volume processed by the satellite-borne base station is unloaded to each ground terminal, so that distributed processing is realized, and the requirement of self-adaptive transmission on the processing capacity of the satellite-borne base station is reduced; the adaptive transmission processing capacity of the whole system is improved, and the method is suitable for uplink adaptive transmission of a satellite-borne base station with limited resources.
Drawings
Fig. 1 is a schematic diagram of an adaptive transmission system for low-resource satellite-ground hierarchical decision of a low-orbit satellite according to an embodiment of the present invention.
Fig. 2 is a flowchart of an adaptive transmission method according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings and the specific embodiments.
An adaptive transmission system for low-resource satellite-ground hierarchical decision of a low-orbit satellite, as shown in fig. 1, comprises a set of satellite-borne base stations and a set of ground terminals. The satellite-borne base station is composed of the following components: on-board network control, on-board switching, on-board modulators, and on-board demodulators. The satellite-borne network control decides an appropriate carrier rate to be adopted by the terminal according to the conditions of the resources and the satellite links; the satellite-borne exchange is mainly used for exchanging information among a satellite-borne modulator, a satellite-borne demodulator and a satellite-borne network controller; the satellite-borne modulator modulates the link layer frame code into a wireless signal for transmission; the satellite-borne demodulator has the capability of demodulating multiple carriers with different speeds, can estimate the signal-to-noise ratio of the uplink carrier, and can receive the uplink state application message sent by the ground modulator to generate the uplink state message. The ground terminal is composed of the following components: modulator, demodulator and access controller. The modulator modulates the link layer frame code generated by the access controller into a wireless signal for transmission; the demodulator is provided with a function of demodulating the downlink signal to generate a link layer frame; the access controller generates an uplink state application message and a radio resource application message, and decides a modulation coding mode to be adopted according to the carrier rate allocated by the satellite-borne network control.
The self-adaptive transmission method for the low-orbit satellite low-resource satellite-ground hierarchical decision is realized based on the self-adaptive transmission system for the low-orbit satellite low-resource satellite-ground hierarchical decision, as shown in fig. 2, and specifically comprises the following steps:
Step (1): the access control component of the ground terminal continuously generates an uplink state application message, and the uplink state application message is converted into a burst analog signal through modulation processing by a ground terminal modulator and is transmitted;
specifically, the uplink state application message includes a device ID of a ground terminal, which is used for communication between the ground terminal and a satellite-borne base station;
Step (2): the satellite-borne demodulator receives the uplink burst analog signal, demodulates and extracts the uplink state application message, extracts the carrier signal-to-noise ratio from the burst analog signal carrying the message, generates the uplink state message, and feeds back the uplink state message to the ground terminal through the satellite-borne exchange and the satellite-borne modulator;
Step (3): the ground terminal demodulator demodulates the downlink carrier wave, receives the uplink state information, and the access control extracts the carrier wave signal to noise ratio in a plurality of uplink state information to smooth, generates a satellite-borne network control reporting frame and sends the satellite-borne network control reporting frame by the modulator;
step (4): the satellite-borne demodulator receives a satellite-borne network control report frame and transmits the report frame to the satellite-borne network control;
Step (5): the satellite-borne network control distributes carriers according to the reported signal-to-noise ratio and the resource condition, generates a frame plan and forwards the frame plan to the ground terminal through the satellite-borne modulator;
Step (6): and (3) the ground terminal receives the frame plan, extracts carrier information, adjusts the transmitted modulation coding mode according to the carrier signal to noise ratio, and then repeats the steps 1 to 6.
The steps are continuously carried out, and the adaptive transmission communication of the satellite-ground link is completed.
Specifically, the uplink state application message, the uplink state message, the satellite-borne network control reporting frame and the frame plan are all link layer frames; the radio resource application message in fig. 2 is a satellite-borne network control reporting frame.
In a word, the invention unloads the large data volume processed by the satellite-borne base station to each ground terminal, realizes distributed processing, and reduces the requirement of realizing adaptive transmission on the processing capacity of the satellite-borne base station; the adaptive transmission processing capacity of the whole system is improved, and the method is suitable for uplink adaptive transmission of a satellite-borne base station with limited resources.
Those skilled in the art will recognize that the embodiments described are for the purpose of aiding the reader in understanding the principles of the invention and should be understood to be not limited to the embodiments described. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (2)
1. The self-adaptive transmission system for low-resource satellite-ground layering decision of the low-orbit satellite is characterized by comprising a satellite-borne base station and a ground terminal;
The satellite-borne base station comprises a satellite-borne network controller, a satellite-borne exchange, a satellite-borne modulator and a satellite-borne demodulator; the satellite-borne network control selects a corresponding carrier rate to be distributed to the ground terminal according to the residual carrier resource condition and the smooth signal-to-noise ratio reported by the ground terminal, and generates a link layer frame; the satellite-borne exchange realizes information exchange among a satellite-borne modulator, a satellite-borne demodulator and a satellite-borne network controller; the satellite-borne modulator modulates the link layer frame codes generated by the satellite-borne demodulator and the satellite-borne network control into downlink analog signals for transmission; the satellite-borne demodulator can demodulate multiple paths of carriers with different rates, estimate the signal-to-noise ratio of uplink carriers corresponding to each path of carrier, and generate a link layer frame;
The ground terminal comprises a modulator, a demodulator and an access controller; the modulator modulates the link layer frame code generated by the access controller into an uplink analog signal for transmission; the demodulator can demodulate the downlink analog signal and generate a link layer frame for transmission to the access controller; the access controller can generate a link layer frame, buffer a plurality of uplink carrier signal-to-noise ratios and calculate a smooth signal-to-noise ratio, and can adjust a modulation coding mode of sending uplink analog signals according to the smooth signal-to-noise ratio and a carrier rate distributed by a satellite-borne network control.
2. The self-adaptive transmission method for the low-orbit satellite low-resource star-earth hierarchical decision is characterized by being realized based on the self-adaptive transmission system for the low-orbit satellite low-resource star-earth hierarchical decision, and specifically comprises the following steps:
step 1, an access controller of a ground terminal continuously generates uplink state application information, sends the uplink state application information to a modulator, modulates the uplink state application information into an uplink analog signal by the modulator, and sends the uplink analog signal to a satellite-borne base station;
Wherein the uplink state application information includes a device ID of a ground terminal;
Step 2, demodulating after receiving the uplink analog signal, extracting uplink state application information, estimating an uplink carrier signal-to-noise ratio corresponding to the uplink analog signal, generating uplink state information according to the uplink carrier signal-to-noise ratio, transmitting the uplink state information to a satellite modulator through satellite-borne exchange by the satellite-borne demodulator, modulating the uplink state information into a downlink analog signal by the satellite-borne modulator, and transmitting the downlink analog signal to a ground terminal;
step 3, the demodulator of the ground terminal demodulates the downlink analog signal, extracts the uplink state information and transmits the uplink state information to the access controller, and the access controller obtains the uplink carrier signal-to-noise ratio according to the uplink state information;
step 4, the access controller continuously caches the latest obtained signal-to-noise ratios of the plurality of uplink carriers, marks the average value of the signal-to-noise ratios of the plurality of uplink carriers as a smooth signal-to-noise ratio, generates a satellite-borne network control reporting frame according to the smooth signal-to-noise ratio, transmits the satellite-borne network control reporting frame to a modulator, modulates the satellite-borne network control reporting frame into an uplink analog signal, and transmits the uplink analog signal to a satellite-borne base station;
step 5, demodulating after the satellite-borne demodulator receives the uplink analog signal, extracting a satellite-borne network control reporting frame, and transmitting the satellite-borne network control reporting frame to a satellite-borne network control through satellite-borne exchange;
Step 6, the satellite-borne network control selects corresponding carrier rates according to the residual carrier resource condition and the smooth signal-to-noise ratio in the report frame of the satellite-borne network control, distributes the carrier rates to the ground terminal, generates a frame plan according to the carrier rates, transmits the frame plan to a satellite-borne modulator through satellite-borne exchange, modulates the frame plan into a downlink analog signal by the satellite-borne modulator, and transmits the downlink analog signal to the ground terminal;
Step 7, the demodulator of the ground terminal demodulates the downlink analog signal, extracts the frame plan and transmits to the access controller, and the access controller adjusts the modulation coding mode of the uplink analog signal according to the carrier rate distributed in the frame plan and the smooth signal-to-noise ratio calculated in the step 3; and (3) continuously executing the steps 1 to 7 to realize the self-adaptive transmission of the low-resource satellite-ground layering decision of the low-orbit satellite.
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| CN202410635713.9A CN118413264A (en) | 2024-05-22 | 2024-05-22 | Self-adaptive transmission system and method for low-resource satellite-ground hierarchical decision of low-orbit satellite |
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| CN202410635713.9A CN118413264A (en) | 2024-05-22 | 2024-05-22 | Self-adaptive transmission system and method for low-resource satellite-ground hierarchical decision of low-orbit satellite |
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